题目

Directions: Write an English composition in 120-150 words according to the instructions given below in Chinese.假设你是明启中学的高三学生王蕾。学校正在招募话剧团(drama club)和机器人社团(robot blub)新成员。你在日记中表达获知该消息时的感受，做出选择，并阐述理由。____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________采取简单随机抽样，从含有6个个体的总体中抽取一个容量为3的样本，个体a前两次未被抽到，第三次被抽到的概率为         A．                     B．                     C．              D．